Mold filling limiting device



O. C. ROESEN MOLD FILLING LIMITING DEVICE- Original Filed Dec. 11, 1929 2 Sheets-Sheet fimw area flak: P0661221 WI/M I May 3, 1932. o. c. ROESEN 1,856,430

MOLD FILLING LIMITIN G DEVICE Original Filed Dec. 11, 1929 2 Sheets-Sheet 2 f v w 4 Patented May 3, 1932 UNITED STATES OSCAR CHARLES ROE-SEN, OF BROOKLYN, NEW YORK, ASSIGNOR TO WOOD NEWSPAPER MACHINERY CORPORATION, OF NEW YORK, N. Y., A CORPORATION OF VIRGINIA.

v MOLD FILLING LIMITING DEVICE Application filed December 11, 1929, Serial No. 413,288. Renewed September 17, 1931.

p This invention relates to a mold filling device and is particularly adapted for use in connection with the filling of stereotype plate molds by a well known type of pump.

The principal objects of the invention are to provide means for limiting the amount of metal poured by the metal pump by the establishment of electrical contact and the opening of a by-pass thereby to prevent further metal being introduced into the mold and especially to provide electrical means in such position and arrangement that it will be controlled solely by the level of the metal in the mold itself so that each mold will be filled up to a definite point and cannot be filled further; to provlde means whereby, whether operated mechanically or automatically, an ample stroke of the pump piston can be employed so that the mold will be sure to be filled before the end of the stroke is reached and there will be no danger of pumping too much metal into' the mold and to provide a simple and convenient construction in which no form of adjustment of the pump stroke will be necessary.

Other objects and advantages of the in-' vention will appear hereinafter.

- Reference is to be had to the accompanying drawings in which Fig. l isa plan of a well known type of stereotype plate casting mold and pump with a referred embodiment of this invention applied thereto;

Fig. 2 is a sectional view taken radially with respect to the pump and showing the mold and spout in side elevation;

Fig. 3 is a radial sectional view of the mold with the metal shown as having reached the point at which the contact is made and the pump stopped; and

Fig. 4 1s a sectional view of the pouring spout showing the operation of the by-pass for the metal.

I have shown the invention as applied to a well known type of pump and mold in which the melting pot is supported by a ring 11 and casing 12. In this melting pot is the pump barrel 13 and piston 14. Any operating means 15, hand or mechanical, can be employed for operating the piston.

The usual valve 16 is shown which will close by the upward rush of the metal when the piston rises so that all the metal will be forced up the spout 17. The valve 16 opens by gravity when the piston falls and fills the barrel 13.

The metal is delivered from the spout 17 to a mold 18 which is shown as a vertical stereotype plate mold, although any other ordinary mold can be filled in this way. Mounted on the back of the casting box of this mold is a plate 20 having a pivot stud 21 and an arm 22 thereon. This arm carries a holder 23 which is provided with an electrical contact finger 24. When the parts are in the position shown in Fig. 3 the arm 22 is in horizontal position resting on a stop 25 and the contact finger is down in the mold. However, this arm 22 can be moved back about its pivot 21 to permit removal and replacement of the matrix. This holder is provided with an electric wire 27 and the mold with another wire 28 and the plate 21 and stop 25 are insulated from the top of the mold by a piece of insulation 29.

When the metal rises in the mold to a point to come into contact with the finger 24, an electric connection will be established from the line 27 to the line 28 through the molten metal and the back of the mold. These electric wires are connected through a battery 31 with the opposite ends of ah electro-magnet 32. Therefore when the metal rises as far as desired in the mold, this magnet will be energized. It pulls up a rod 33 which opens a by-pass valve 34 covering a port 35 as shown in Fig. 4. This is opened against the action of a spring 36 whichnormally keeps this valve closed. When opened, the metal coming up the spout 17 is alldischarged back 5 enough metal up the spout to more than fill into the melting pot throughthe port 35 and no more metal can be discharged into the mold. Thus there is no chance of the mold being overfilled and running over and the pump stroke can be made as long as deslred, within reasonable limits, so as to be sure that enough metal is pumped into the mold at each operation of the piston.

This also assists the circulation of metal in the melting pot and entails very little mechanism and nothing that is likely to get out of order.

Although I have illustrated and described only one form of the invention I am aware of the fact that modifications can be made therein by any person skilled in the art without departing from the scope of the invention as expressed inthe claims. Therefore I do not wish to be limited in this respect but what I do claims is 1. The combination with a mold and pump for supplying it with molten metal, of an electric contact finger located in the mold and means whereby when the metal rises to said contact finger an electric current will be established and the flow of metal to the mold will be stopped.

2. The combination with-a mold for casting metal and means for supplying the metal tothe mold,'of an electric contact located in the mold and spaced from its walls, an electric circuit of which said contact is one terminal, the mold being the other terminal, a source of power insaid circuit, an electromagnet in the circuit adapted to be energized when the circuit is completed by the rise of the metal in the mold, and means connected with said .magnet for stopping the further discharge of metal into the mold.

3. The combination with a mold and pump having a spout for delivering into the mold, of an electric contact located in the mold, an

electric circuit of which said contact and mold are terminals, a source of power in said circuit, an electro-magnet in the circuit, and means operated by said magnet for allowing all the metal in the spout to be discharged into the pump independently of the operation of the pump.

4. The combination with a stereotype mold, a spout for delivering metal to the mold and means for forcing enough metal up the spout to fill the mold, said spout having a by-pass and a valve for controlling the by-pass, of an electric contact located within the mold, an electric circuit connected with a source of power and said contact at one side 1 and the mold at the other, and an electromagnet in said circuit having a plunger, said plunger being connected with said valve for opening it when the magnet is energized. 1

5. The combination with a stereotype mold for casting metal, a spout for delivering metal to the mold and means for forcing the mold, said spout having a by-pass and a valve for controlling the by-pass, of an electric contact locatedwithin the mold between its walls, an electric circuit connected with a OSCAR o. ROESEN. 

